How does it decide where to split the document?

It splits along page boundaries, grouping consecutive pages together until adding another would exceed your target size, then starts the next file.

Can a single page ever exceed the target size on its own?

If one page's content (usually a large embedded image) is bigger than your target by itself, that page still becomes its own file slightly over the limit — pages can't be split mid-page.

What size limit should I set for email attachments?

Most providers cap attachments around 25MB, but a smaller target like 10-15MB leaves headroom for the email itself and any other attachments.

Does PDF Split by Size upload my files to a server?

No. PDF Split by Size runs entirely in your browser using on-device processing, your files never leave your device.

PDF Split by Size

Split a large PDF into multiple files, each under a target file size.

Runs in your browser

Drop a PDF here

Choose File

About this tool

Email attachment limits, upload caps, and storage quotas are usually expressed in megabytes, not pages — a PDF with a handful of image-heavy pages can easily exceed a limit that a hundred-page text document wouldn't come close to. This tool splits a large PDF into multiple smaller files, each kept under a target size you set, so you don't have to guess how many pages will fit and split manually by trial and error.

Frequently asked questions

Split PDF

Extract pages or split a PDF into multiple files.

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Compress PDF

Reduce PDF file size while keeping quality.

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Combine multiple PDF files into a single document.

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Convert PDF documents into editable Word files.

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Convert Word documents into PDF files.

PDF to JPG

Convert PDF pages into JPG images.

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Convert JPG images into a single PDF file.

Rotate PDF

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Remove PDF Pages

Delete specific pages from a PDF document.

Extract PDF Pages

Pull selected pages out of a PDF into a new document.

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